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Grade: DuPont™ Kapton® B
Formula: PI
Form: Coil
Material: Polyimide (PI)
CAS Number: 60842-76-4
Commodity: Polymers
Coil Width: 610mm
Color: Black
Kapton® B Polyimide Coil is engineered for applications requiring stable performance under high thermal and electrical stress, including sensors, flexible circuits, and electromagnetic coils. Its excellent dielectric strength and thermal resistance enable reliable operation in environments up to 400°C. The material’s chemical inertness and radiation resistance support research and laboratory uses in aerospace, electronics, and materials testing. Kapton® B’s flexibility and dimensional stability facilitate integration into compact devices, multilayer assemblies, and high-precision instrumentation. Its robust properties also make it suitable for analytical equipment and harsh environment sensors, ensuring consistent results in demanding scientific and industrial applications.
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Tolerances

Coil
Thickness ±20%

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Poor
Acids - dilute Fair
Alcohols Poor
Alkalis Poor
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good
Halogens Fair
Ketones Good
Mechanical Properties
Element Value
Coefficient of friction 0.42
Hardness - Rockwell E52-99
Elongation at break( % ) Aug-70
Tensile modulus( GPa ) 2.0 – 3.0
Izod impact strength( J m⁻¹ ) 80
Tensile strength( MPa ) 70-150
Electrical Properties
Element Value
Dielectric constant @1MHz 3.4
Dissipation factor @ 1kHz 0.0018
Dielectric strength( kV mm⁻¹ ) 22
Surface resistivity( Ohm/sq ) 10¹⁶
Volume resistivity( Ohmcm ) 10¹⁸
Physical Properties
Element Value
Flammability V0
Radiation resistance Good
Refractive index 1.66
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 53
Water absorption - over 24 hours( % ) 0.2-2.9
Density( gcm⁻³ ) 1.42
Thermal Properties
Element Value
Heat-deflection temperature - 1.8MPa( C ) 360
Lower working temperature( C ) -270
Upper working temperature( C ) 250-320
Specific heat( J K⁻¹ kg⁻¹ ) 1090
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.1-0.35@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 30-60

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